A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound?

A.

CaCl

B.

Ca0.9Cl1.8

C.

CaCl2

D.

Ca2Cl4

Which factors may contribute to the extinction of a species? Check all that apply. more individuals fighting over the same resources fewer individuals fighting over the same resources the loss of the environment in which an organism's needs are met

Which pair of atoms have the most polar bond

Which of the following is a cause if soil compaction

A 8.5-liter sample of a gas has 1.2 mole of the gas. If 0.65 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant. 13 liters 14 liters 18 liters 21 liters

Which is most likely to happen during a precipitation reaction?

What are elements and how do they differ?

Write the structire of the salt that forms when diethylamine is mixed with hydrochloric acis

The heat of combustion of propane, C3H8, is 2220 kJ/mol. The specific heat of copper is 0.385 J/g°C. How many grams of propane must be burned to raise the temperature of a 10.0 kg block of copper from 25.0°C to 65.

Which is an example of Temporal Isolation? A. Flowers that bloom in different months. B. Birds that have different mating calls C. Fruits flies that mate in different locations. D. Squirrels that have different fur colors

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer